TL;DR
Kert Gartner created a digital ASCII aquarium that runs on the Cheap Yellow Display (CYD), a touchscreen development board featuring a 320x240 display. Unlike traditional aquariums, this project requires no maintenance, allowing users to enjoy animated fish and sea creatures without the hassle of cleaning or feeding. The aquarium is powered by an ESP32 microcontroller, which renders the fish live on the screen, making them swim, school, and chase floating food flakes when you tap the display.